Wrench.



G. R. BAIR.

WRENCH.

Arrnroulon funn um: ze, 1910.

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994,364,l Patented June 6, 1911.

UNITED STATES-PATENT oFF-ion,

GEORGE R. BAIR, 0F BELVUE, KANSAS, ASSIGNOR 0F ONE-THIRD -TO'I-IENRY E.SHORT AND ONE-THIRD TO CARL MILLER, 0F BELVUE, KANSAS. Y

WRENCH.

Specification of Letters Patent.

Patented June e, 1911.

To all whom it may concern:

Be it known that I, GEORGE It. Barn,

citizen of the United States, residing at Belvue, in the county ofPottawatomie and State of Kansas, have invented certain new and usefulImprovements in Wrenches, of which the following is a specification.

This invention comprehends certain new and useful improvements inwrenches of the sliding jaw type, and the invention has for its primaryobject a simple construction of wrench of this character which will bedurable and strong, easy to handle and adjust, and capable of beingcheaply manufactured, the preferred embodiment of the inventioncomprising a combination nut and pipe wrench.

With this and other objects in view as will more fully appear-as thedescription proceeds, the invention consists in certain constructions,arrangements and combinations of the parts that I shall hereinafterfully describe and claim.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawings, in which:

Figure l is a perspective view of my improved device arranged as a pipewrench; Fig. 2 is a side elevation of the device arranged as a nutwrench; and, Fig. 3 is a transverse sectional view, the section beingtaken substantially on the line 3 3 of Fig. 2.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The present embodiment of the invention includes a shank 1 which may beof any desired length, width and thickness, .the said shank havingoppositely extending ends Q and 3 which project substantially at rightangles from the shank, said ends forming the relatively fixed or rigidjaws of the tool.

4 and 5 designate the movable jaws. The movable j aws' lie against theopposite edges of the shank l, one of said jawsbeing toothed to co-actwith the corresponding fixed jaw, so that these two jaws may be used forengaging pipes, rods or the like, while the other movable and xed jawsare preferably smooth, so as to render them more applicable for use withnuts or any other work where liability to mar the parts will beprecluded.

Each of the two movable jaws 4 and 5 is formed with a lock stem 6. Thetwo stems 6 are pivotally connected by two pairs of links 7 which arearranged in parallel relation to each other on opposite sides of theshank l, being pivotally connected to the respective stems by rivets orsimilar fastening devices. Preferably, the shank 1 is formed near eachend and on opposite side edges with a rack 8, and each locking stem G iscorrespondingly formed with one or more teeth 9 arranged for lockingengagement with the teeth of the respective rack, there being two ofthese locking teeth for each stem in the Vpresent instance, the teethbeing` arranged near the ends of the stem, as clearly illustrated in thedrawing.

From the foregoing description in' connection with the accompanyingdrawing, the operation of my improved wrench will be apparent. In thepractical use .of the device, either one movable jaw or the other ismoved up along the shank to engage the` work with this complemental xedaw, and the opposite locking stem is then pushed forwardly so as tocause the links to assume an oblique position relative to the Shanks,with the teeth of said stemsecurely engaged in the teeth of the adjacent rack 8. It will thus be understood that any tendency of thel jawsto open will be effectually resisted by the canting effect and theinterlocking engagement of one set of locking teeth with the adjacentrack. In order to adjust thev wrench it is only necessary to move thetwo jaws 4 and 5 relative to each other until the links assume aposition substantially at right angles to the shank, whereupon the twolocking stems will be at the maximum distance apart and the jaws 4 and 5can be easily slid along the shank toward one end or the other to securethe desired adjustment, according as the wrench is to be used as a pipewrench or a nut wrench.

Having thus described the invention, what is claimed as new is:

The herein described wrench, embodying a shank provided at opposite endswith oppositely extending fixed jaws, movable jaws arranged againstopposite edges of the shank. and adapted to co-act with the fixed jaws,respectively, each jaw being provided with a locking stem formed withteeth, and the shank being formed on lits edges with racks adapted to beengaged by said teeth, and

t-Wo pairs of links in parallel relation to each other, connected to therespective locking stems, the links embracing the shank, Whereby thestem of each movable jaw may, by engaging the shank, hold the othermovable jaw in operative position relative to its complemental xed jaw.

In testimony whereof, I affix my signature 1n presence of two Witnesses.

GEORGE R. BAIE.

wWitnesses MARY A. SNODGRASS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

NELLIE BAIR, i

